A test rack measures how long batteries last. It mimics the use of devices like flashlights or digital cameras.

The Toys "R" Us Ultra alkaline batteries delivered just four hours of flashlight time and 49 shots from a digital camera.

Compare that to Energizer Ultimate Lithium, the top-rated battery that racked up more than seven hours of flashlight time and 609 shots.

"Although they're more expensive, lithiums can provide up to five times the power of an alkaline under certain circumstances," DeClerico said.

The extra lithium boost is worth it for digital cameras and gaming controllers -- devices that need more power.

But Consumer Reports says alkaline batteries are the way to go for toys that are used less often.

The Duracell Quantum proved the best alkalines and are half the price of the lithiums.

Once your AA batteries are dead, you can throw them out with your regular trash, but remember, any rechargeable batteries you buy should be recycled. You can get information on battery recycling locations at www.call2recyle.org.